Gas apparatus.



PATENTED DEC. 11, 1906.

J. A. PERRY.

GAS APPARATUS.

APPLICATION FILED SEPT. 7,1905.

UNITED f STATES PATENT OFFICE.

JOSEPH A. PERRY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE UNITED GAS IMPROVEMENT COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

GAS APPARATUS.

Patented Dec. 11,. 1906.

Application filed September 7, 1905. Serial No. 277,300.

T0 at whom it may concern:

Be it known that I, JOSEPH A. PERRY, a citizen of the United States, residing at the city of Philadelphia, in the county of Phila delphia and State of Pennsylvania, have in' vented certain new and useful Improvements in Gas Apparatus, of which the following is a specification.

Objects of the present invention are to rotect the relief-holder from-damage suc as would result from the production of a vacuurn by the exhauster, to limit the pressure at the outlet of the exhauster, to prevent the induction of water from the relief-holder into the inlet-pipe of the exhauster, to provide improved safety-seals for gas-works, to automatically and properly control the pressures in the apparatus for protecting the same and insuring its proper operation, and to prevent excessive pressure upon and blowing of the seals of the apparatus beyond the exhauster.

The nature, characteristic features, and scope of my invention will be more fully understood from the following description, taken in connection with the accompanying drawing, forming part hereof, and in which there is illustrated, partly in section and partly in elevation, portions of a gas-works containing features of the invention.

In the drawing, 1 is a relief holder and tank,'which may be considered as receiving gas from the generating portion of the apparatus. (Not shown.) For simplicity the relief-holder is illustrated as a steel tank 20, having one lift 21, shown at such a height that the safety-seal 2 over the holder-outlet pipe 3 is sealed off with the water in the safety-seal 2 at such a level a a above the water-level b b in the tank as corresponds with atmos heric pressure in the safety-seal 2. This di erence in water-level is due and equivalent to the pressure thrown by the relief-holder 21 or by the inner lift of the reliefholder in cases where there are more than one lift.

4 is a drip on the outlet-pipe 3.

c is the suction-pipe from the relief-holder to the exhauster 5, and (Z is the dischargepipe from the exhauster to purifiers and other apparatus which go to make up the complete plant and which are not shown.

6 is the exhauster safety-seal, and it is provided with a dip-pipe 7, connected by a pipe e to the discharge-pipe d, and it is also provided with a top outlet 8, connected by a pipe f to the suction-pipe c. The difference in waterlevel it h in the dip-pipe 7 and water-level g gin the seal 6 represents a pressure thrown by the inner lift of a storage holder when no gas is passing from the discharge-pipe d to the storage holder and corresponds with atmospheric pressure in the safety-seal 6- above the water-level g 9. As stated, the storagefholders are not shown but; they are connected with the pipe 01 and may exert pressure in and through it. 9 is an overflowl'for water from the safety-seal 6 to the seal-pot 10, and it serves to maintain the water-level in the safety-seal 6.

11 is an overflow from the seal-pot 10 to a drain or sewer. The overflow 9 is dipped or sealed in the water contained in the pot 10 to such depth that ordinarily no gas will pass out through 9 by the blowing of the seal in the pot 10. V

1.3 is a water-pipe for initially filling the seal 6 or for supplying water to take the place of any water that might be blown out by the operation of the seal.

12 is a gage-glass for indicating the Waterlevel g g in the safety-seal 6. The outletpipe 3 of the relief-holder extends a distance i above the level a a, and the dip-pipe 7 of the safety-seal 6 extends a distance 7c below the water-level h h. The distance "i must be greater than the distance 7c, as it is the intention to make the seal 6 fnore responsive than the relief-holder seal in the sense that it will blow first. The distance m, plus the maximum pressure expressed in inches of water thrown by the relief-holder, must be less than the depth of water seal on the wet-seal purifiers, or less than the maximum pressure expressed in inches of water allowable on dry-- seal purifiers or other apparatus connected with the pipe d. The purpose of this is to render the seal 6 more sensitive than the seals of the apparatus connected with the pipe (2 and supplied thereby.

Should the exhauster 5 exhaust gas from the relief-holder 1, the safety-seal 2 will seal off the outlet-pipe 3, and thus prevent the exhauster, should it continue to work, from causing a vacuum in the holder 21 above the parting from the spirit thereof.

waterlevel b b; but if the safety-seal 6 were omitted it would be possible to secure a vacuum equivalent to a height of water equal to the distance i, and then the water would run over into the pipe 3 to the drip 4 and seal off the outlet, and in some cases if the exhauster were not stopped the water would reach it. However, with the seal 6 present, when a vacuum equal to a height of water 70 is reached in the seals 2 and 6 gas will enter the pipe 6 from the discharge-pipe (1, pass down the dip-pipe 7, break the seal, and bubble through the water in the seal 6 to the outlet 8 and through the pipe f to the inlet-pipe 0. Thus there is automatically formed a bypass between the inlet and outletpipes of the exhauster, and the vacuumin the seal 2 is thus limited to correspond with a depth of water equal to the distance 7c, and since the distance iis greater than the distance 76 no water can pass over into the pipe 8. The

seal 6 acts as a safety-seal to limit the pressure on the purifiers or other apparatus supplied by thepipe d, and should a valve be shut on the discharge-line d, and if all the seals throughout the works are made of sufii-- cient depth, then the pressure will rise in outlet-pipe d and gas will pass through pipe 6 down through dip-pipe 7 bubble through water in seal 6, to outlet 8, and go through pipe f to exhauster in the pipe 0, and thus form an automatic by-pass.

It will be obvious to those skilled in the art to which my invention appertains that modifications may be made in detail Without de- Hence the I invention is not limited further than thefprior state of the art may require; but

What I claim is 1. The combination in a gas-works of a relief-holder, an eXhauster having a suctionpipe to the relief-holder and a dischargepipe, a safety-seal on the outlet of the reliefholder, and a safety by-pass seal interposed between the suction and discharge pipes and more responsive than the first-mentioned seal and adapted to break at less than the allowable pressure on the discharge-pipe, substantially as described.

2. The combination of a relief-holder, an exhauster having a suction-pipe to the reliefholder and a discharge-pipe, a safety-seal on the outlet of the relief-holder, and a safetyseal interposed between the suction and discharge pipes and adapted to break before the first-mentioned seal, substantially as described.

3. The combination of a relief-holder, an exhauster having a suction-pipe to the reliefholder and a discharge-pipe, an automatic closure on the outlet of the relief-holder, and a safety automatic closure between the suction and discharge pipes and adapted to open before the first-mentioned closure, substantially as described.

In testimony whereof I have hereunto signed my name in the-presence of two wit- F. H. MAoMoRRIs. F. B. RANKIN. 

